Etymologies

under- +‎ rate (Wiktionary)

Examples

Thousands of misleading mortgages to easily fooled people hopeful at the chance to own a home WITH Wall Street gambling on them, against them AND improperly insuring them after paying ratings companies to underrate the risk to goose the underwriting = what happened and why we're suffering. haren

Thousands of misleading mortgages to easily fooled people hopeful at the chance to own a home WITHOUT Wall Street gambling on them, against them AND improperly insuring them after paying ratings companies to underrate the risk to goose the underwriting = thousands of foreclosures, and the banks, for the most part, go on their merry way owning a lot more property than they previously did.

First, Michael Ratcliffe in The Times (London): Most British reviews have taken Mr. Vidal with total seriousness, up to a point, but to conclude, as some have, that Myra Breckinridge is a novel about sex as the source of all ultimate power is greatly to underrate its subtlety.

You underrate the firstlings of the heart, the rose and white blossoming, the call upon the senses and the readiness to respond and to fulfil, to give and to take, to be and make happy — the great pride and utter abandon which is young love.

This lies at the intersection of the fact that reporters underrate the importance of the economy in determining political outcomes, reporters underrate the importance of the Fed in determining economic outcomes, and reporters underrate the importance of the other committee members in determining Fed policy.